Atsushiba Sachiko

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Name
Atsushiba Sachiko
Affiliation
University of Yamanashi
Section
Graduate Faculty of Interdisciplinary Research Faculty of Education, Human Science (Science Education)
Job title
Associate Professor
Research funding number
20327761

Research Areas

 
 

Published Papers

 
NONLINEAR ERGODIC THEOREMS FOR NORMALLY 2-GENERALIZED HYBRID SEQUENCES 
Atsushiba Sachiko
Journal of Nonlinear and Convex Analysis   20(2) 251-264   Feb 2019   [Refereed]
Attractive point and convergence theorems for hybrid-type sequences
Sachiko Atsushiba
(Nonlinear analysis and con-vex analysis), RIMS Kokyuroku,   2112    2019   [Invited]
Convergence theorems for generalized hybrid-type sequences and some nonlinear mappings
Sachiko Atsushiba
RIMS Kokyuroku   to appear    2019
Fixed point and convergence theorems for generalized hybrid-type mapping
Atsushiba Sachiko
Nonlinear Functional Analysis and Applications   to appear    2019   [Refereed]
Approximation of attractive points of nonlinear mappings, --Common attractive poits, common acute poit, common fixed points and convergence theorems--
Sachiko Atsushiba
Nonlinear analysis and con-vex analysis, RIMS Kokyuroku   to appear    2019
Convergence theorems of iterative sequences for nonlinear operators
Sachiko Atsushiba
RIMS Kokyuroku   2095 106-113   Dec 2018   [Invited]
Common acute points and convergence theorems for families of nonlinear mappings
Sachiko Atsushiba
Nonlinear analysis and con-vex analysis, RIMS Kokyuroku,   2065 100-110   2018   [Invited]
Weak and strong convergence theorems for some classes of nonlinear mappings
Sachiko Atsushiba, Shigeru Iemoto, Rieko Kubota and Yikio Takeuchi
Josai Mathematical Monograph,   11 97-104   2018   [Refereed]
Attractive points, acute points and approximation of common fixed points of families of nonlinear mappings related to hybrid mappings
Sachiko Atsushiba
RIMS Kokyuroku   2041 38-47   2017
Attractive points, fixed points and convergence Theorems for some classes of nonlinear mappings
Sachiko Atsushiba
Proceeddings of ths symposium on Real Analysis   2017 41-46   2017   [Invited]
Acute points, weak and strong convergence theorems for nonlinear mappings in Hilbert spaces,
Sachiko Atsushiba
RIMS Kokyuroku   2011 100-104   2016
Attractive points, acute points and approximation of fixed points of nonlinear mappings
Sachiko Atsushiba
Proceeddings of ths symposium on Real Analysis 2017   2016 41-46   2016
Strong convergence to common attractive points for nonexpansive semigroups by Halpern’s type iterations
Sachiko Atsushiba
Nonlinear Analysis and Convex Analysis   9 41-52   2016   [Refereed]
Convergence theorems for some classes of nonlinear mappings in Hilbert spaces
Sachiko Atsushiba, Shigeru Iemoto, Rieko Kubota and Yikio Takeuchi
Linear and Nonlinear Analysis,   2 125-153   2016   [Refereed]
Strong convergence theorems for asymptotically regular nonexpansive semigroups by Some iterations
Sachiko Atsushiba
Nonlinear analysis and con-vex analysis, RIMS Kokyuroku   1963 150-161   2015
Strong convergence to common attractive points of uniformly asymptotically regular nonexpansive semigroups.
Sachiko Atsushiba
J. Nonlinear Convex Ana   16 69-78   2015   [Refereed]
Strong convergence theorems for uniformly asymptotically regular nonexpansive semigroups in Banach spaces,
Sachiko Atsushiba
Banach and Functions Spaces   6 275-288   2015   [Refereed]
Strong convergence theorems for nonexpansive semigroups by Halpern's type iterations,
Sachiko Atsushiba
Nonlinear Analysis and Convex Analysis   8 57-68   2015   [Refereed]
Strong Convergence to Common Attractive points of Asymptotically Regular Nonexpansive Semigroups
Sachiko Atsushiba
Mathematics for Uncertainty and Fuzziness, RIMS Kokyuroku   1906 24-33   2014
Strong convergence theorems for asymptotically regular nonexpansive semigroups by Some iterations
Sachiko Atsushiba
Nonlinear analysis and con-vex analysis, RIMS Kokyuroku   1923 118-124   2014
Strong convergence theorems for nonexpansive semigroups by Browder's type iterations
Sachiko Atsushiba
Nonlinear Analysis and Optimizatio   3 23-34   2014   [Refereed]
Nonlinear Ergodic Theorems without Convexity for Nonexpansive Semigroups in Hilbert Spaces
Sachiko Atsushiba and Wataru Takahashi
J. Nonlinear Convex Anal.,   14 209-219   2014   [Refereed]
Strong Convergence Theorems for Uniformly Asymptotically Regular Nonexpansive Semigroups in Banach spaces,
Sachiko Atsushiba
Banach and Function Spaces   4 275-288   2013   [Refereed]
Browder's Convergence for Uniformly Asymptotically Regular Nonexpansive Semigroups in Banach spaces
Sachiko Atsushiba
Nonlinear analysis and con-vex analysis, RIMS Kokyuroku   1841 35-41   2013
Weak and strong convergence theorems for uniformly asymptotically regular nonexpansive semigroups
Sachiko Atsushiba
Nonlinear analysis and con-vex analysis, RIMS Kokyuroku   1821 115-122   2013
Strong convergence theorems for uniformly asymptotically regular nonexpansive semigroups by Browder’s type iterations
Sachiko Atsushiba
Nonlinear Analysis and Convex Analysis   7 11-19   2012   [Refereed]
On the approximating common fixed points and the existence of the common fixed points of nonexpansive semigroups,
Sachiko Atsushiba
Banach and Function Spaces   3 351-365   2011   [Refereed]
Viscosity approximation methods for families of strictly pseudo contractive mapings and nonself nonexpansive mappings
Sachiko Atsushiba
バナッハ空間論の研究とその周辺, RIMS Kokyuroku, 1753, (2011), 82--89   1753 82-89   2011
Viscosity Approximation Methods for Fixed Points Problems,
Sachiko Atsushiba
Nonlinear analysis and convex analysis, RIMS Kokyuroku   1755 124-130   2011
あるハイブリッドタイプの点列と非拡大写像の不動点の存在について,
Sachiko Atsushiba
非加法の数理と情報:凸解析との接点, RIMS Kokyuroku   1683 78-83   2010
On the Approximated Sequences and the Existence of Fixed Points of Nonlinear Mappings
Sachiko Atsushiba
Proceedings of symposium on real analysis 2010   42 67-70   2010
Existence of common fixed point and strong convergence theorems for nonexpansive semigroup by hybrid type method
Sachiko Atsushiba
Nonlinear analysis and convex analysis, RIMS Kokyuroku   1685 138-148   2010
On the Sequences by the Hybrid Type Method and the Existence of Common Fixed Points of Families of Nonexpansive Mappings
Sachiko Atsushiba
Nonlinear analysis and convex analysis, RIMS Kokyuroku   1643 94-103   2009
The Sequences by the Hybrid Type Method and the Existence of Common Fixed Points of Nonexpansive Semigroups in a Hilbert Space,
Sachiko Atsushiba and Wataru Takahashi
Nonlinear Analysis and Optimization   2009 19-29   2009   [Refereed]
擬非拡大写像族に対する弱収束定理について,
Sachiko Atsushiba
Information and mathematics of non-additivity and non-extensivity: contacts with nonlinearity and non-commutativity, RIMS Kokyuroku,   1585 77-90   2008
Weak and strong convergence theorems for a family of relatively nonexpansive mappings in Banach spaces
Sachiko Atsushiba
Nonlinear analysis and convex analysis, RIMS Kokyuroku   1611 67-75   2008
距離射影を用いた非拡大写像族の共通不動点近似について,
Sachiko Atsushiba
Recent results of Banach and function spaces and its applications, RIMS Kokyuroku,   1615 34-43   2008
Strong Convergence Theorems for a Countable Family of Nonexpansive Mappings in Banach Spaces by Browder's Type Iterations
Sachiko Atsushiba
Banach and Functional Spaces,   2 293-308   2008   [Refereed]
Strong Convergence Theorem for a Family of Relatively Nonexpansive Mappings in Banach Spaces
Sachiko Atsushiba
Fixed Point Theory and its Applications   8 19-28   2008   [Refereed]
Weak Convergence Theorem for a Family of Relatively
Sachiko Atsushiba and Wataru Takahashi
Nonlinear Analysis and Convex Analysis   5 47-59   2008   [Refereed]
Approximating Common Fixed Points of Nonexpansive Semigroups in Banach Spaces by Metric Projections
Sachiko Atsushiba and Wataru Takahashi
Scientiae Mathematicae Japonicae   68 323-331   2008   [Refereed]
Convergence of iterative sequences for nonlinear operator in Banach spaces
Sachiko Atsushiba
Hokkaido University Technical Report Series in Mathematics,   128 68-73   2008
Approximating Zero Points of Accretive Operators by Implicit Iterative Sequences,
Sachiko Atsushiba
Taiwanese J. Math.   11 807-818   2007   [Refereed]
Weak Convergence Theorems for a Countable Family of Nonexpansive Mappings in Banach Spaces which satisfy Opial's condition
Sachiko Atsushiba
Applied Functional Analysis, --Information Science and Related Topics--   5 153-168   2007   [Refereed]
Weak and Strong Convergence for Nonexpansive Semigroups in a Banach Space satisfying Opial's condition
Sachiko Atsushiba and Wataru Takahashi
Scientiae Mathematicae Japonicae,   65 147-160   2007   [Refereed]
Strong Convergence Theorems for a Countable Family of Nonexpansive Mappings in General Banach Spaces
Sachiko Atsushiba
Nonlinear Analysis and Convex Anlysis   4 47-60   2007   [Refereed]
Weak and Strong Convergence of Implicit Iterative Sequences for Nonlinear Operators
Sachiko Atsushiba
非線形解析学と凸解析学の研究 (Nonlinear analysis and convex analysis), RIMS Kokyuroku   1544 57-66   2007
Strong and Weak Convergence Theorems for a Countable Family of Nonexpansive Mappings in Banach Spaces
Sachiko Atsushiba
Nonlinear analysis and convex analysis, RIMS Kokyuroku   1520 45-52   2006
Weak and Strong Convergence Theorems for Accretive Operators by an Implicit Iterative Scheme
Sachiko Atsushiba
Nonlinear analysis and convex analysis,RIMS Kokyuroku, {\bf 1484 } (2006) 52--58.   1484 52-58   2006
On Nonlinear Ergodic Theorems for Nonexpansive Semigroups in Banach Spaces,
Sachiko Atsushiba
非線形解析学と凸解析学の研究(Nonlinear analysis and convex analysis), RIMS Kokyuroku,   1415 96-104   2005
Approximating Common Fixed Points of Families of Nonexpansive Mappings
Sachiko Atsushiba
第44回実函数論・函数解析学合同シンポジウム 講演集,   44 36-52   2005
Sachiko Atsushiba and Wataru Takahashi
Nonlinear Anal.   61 881-899   2005   [Refereed]
Sachiko Atsushiba and Wataru Takahashi
Fixed Point Theory and Applications,   2005 343-345   2005   [Refereed]
Weak and Strong Convergence of Implicit Iterations for Families of Nonexpansive Mappings in Banach Spaces,
Sachiko Atsushiba
Advanced Study of Applied Functional Analysis and Information, RIMS Kokyuroku,   1452 142-152   2005
On Nonlinear Strong Ergodic Theorems in Banach Spaces,
Sachiko Atsushiba
Nonlinear analysis and convex analysis,RIMS Kokyuroku   1365 95-103   2004
On Strong Convergence for Nonexpansive Mappings in Banach Spaces
Sachiko Atsushiba
Proceedings of the Symposium on Nonlinear Functional Analysis and Convex Analysis   2004 308-319   2004   [Refereed]
Strong Convergence Theorems for Commutative Nonexpansive Semigroups in General Banach Spaces
Sachiko Atsushiba
Banach and Function Space   2004 175-184   2004   [Refereed]
Strong Convergence Theorems for Finite Nonexpansive Mappings in Banach Spaces
Sachiko Atsushiba
Nonlinear Analysis and Convex Analysis   3 9-16   2004   [Refereed]
Strong Convergence of Iterative Sequences for Asymptotically Nonexpansive Mappings in Banach Spaces
Sachiko Atsushiba
Sci. Math. Japon   57 377-388   2003   [Refereed]
Some Strong Convergence Theorems for Nonexpansive Semigroups
Sachiko Atsushiba
Nonlinear Analysis and Convex Analysis   2 15-24   2003   [Refereed]
Convergence Theorems for Finite Mappings
Sachiko Atsushiba
Nonlinear analysis and convex analysis,RIMS Kokyuroku   1246 186-194   2002
Strong Convergence Theorems for Families of Asymptotically Nonexpansive Mappings
Sachiko Atsushiba
Nonlinear analysis and convex analysis, RIMS Kokyuroku,   1298 123-134   2002
Strong Convergence Theorems for Nonexpansive Semigroups by a Hybrid Method
Sachiko Atsushiba and Wataru Takahashi
J. Nonlinear and Convex Anal.   3 231-242   2002   [Refereed]
Strong Convergence Theorems for Finite Quasi-nonexpansive Mappings
Sachiko Atsushiba
Communications on Applied Nonlinear Anal   9 57-68   2002   [Refereed]
Strong convergence theorems for one-parameter nonexpansive semigroups with compact domains
Sachiko Atsushiba and Wataru Takahashi
Fixed Point Theory and Applications   3 15-31   2002   [Refereed]
Nonlinear Strong Ergodic Theorems with Compact Domains
Sachiko Atsushiba
Nonlinear analysis and convex analysis,RIMS Kokyuroku   1187 176-186   2001
Strong Convergence Theorems with Compact Domains
Sachiko Atsushiba
Nonlinear analysis and convex analysis,RIMS Kokyuroku   116 45-55   2000
Approximating Common Fixed Points by the Mann Iteration Procedure in Banach Spaces
Sachiko Atsushiba, Naoki Shioji and Wataru Takahashi
J. Nonlinear and Convex Anal.   J. Nonlinear and Convex Anal. 351-361   2000   [Refereed]
Nonlinear Strong Ergodic Theorems for Commutative Nonexpansive Semigroups on Strictly Convex Banach Spaces
Sachiko Atsushiba, Anthony To-Ming Lau and Wataru Takahashi
J. Nonlinear and Convex Anal.   J. Nonlinear and Convex Anal. 213-231   2000   [Refereed]
A Nonlinear Strong Ergodic Theorem for Nonexpansive Mappings with Compact Domains
Sachiko Atsushiba and Wataru Takahashi
Math. Japon.   52 183-195   2000   [Refereed]
Strong Convergence of Iterates of Nonexpansive Mappings and Applications,
Sachiko Atsushiba
Convex Anal. Chaos, Josai Math. Monographs.,   1 87-98   1999
A Weak Convergence Theorem for Nonexpansive Semigroups by the Mann Iteration Process in Banach Spaces
Sachiko Atsushiba and Wataru Takahashi
Nonlinear Analysis and Convex Analysis   1 102-109   1999   [Refereed]
Strong Convergence Theorems for a Finite Family of Nonexpansive Mappings and Applications
Sachiko Atsushiba and Wataru Takahashi
Indian J. Math.   41 435-453   1999   [Refereed]
Modulus of Convexity and Convergence Theorems for Families of Nonexpansive Mappings
Sachiko Atsushiba
Nonlinear analysis and convex analysis,RIMS Kokyuroku   1031 138-148   1998
Nonlinear Ergodic Theorems for Almost Nonexpansive Curves,
Sachiko Atsushiba
Nonlinear analysis and convex analysis,RIMS Kokyuroku   1071 44-58   1998
Approximating Common Fixed Points of Two Nonexpansive Mappings in Banach Spaces
Sachiko Atsushiba and Wataru Takahashi
Bull. Austral. Math. Soc.   57 117-127   1998   [Refereed]
Nonlinear Ergodic Theorems in a Banach Space Satisfying Opial's Condition
Sachiko Atsushiba and Wataru Takahashi
Tokyo J. Math.   21 61-81   1998   [Refereed]
Approximating Common Fixed Points of Asymptotically Nonexpansive Semigroups by the Mann Iterative Process
Sachiko Atsushiba
PanAmer. Math. J.   8 45-58   1998   [Refereed]
Nonlinear Ergodic Theorems for Almost Nonexpansive Curves over Noncommutative Semigroups
Sachiko Atsushiba
Sci. Math.   1 319-337   1998   [Refereed]
Nonlinear Ergodic Theorems for Families of Nonexpansive Mappings in Banach Spaces
Sachiko Atsushiba
Nonlinear analysis and convex analysis,RIMS Kokyuroku   985 151-166   1997
Approximating Common Fixed Points of Nonexpansive Semigroups by the Mann Iteration Process
Sachiko Atsushiba and Wataru Takahashi
Ann. Univ. Mariae Curie-Sk{\l}odowska   51 1-16   1997   [Refereed]

Conference Activities & Talks

 
Weak ad strong convergence theorems for generalized hybrid-type sequences and some nonlinear mappings
Sachiko Atsushiba
日本数学会2019年度年会  実函数論分科会,   19 Mar 2019   日本数学会
Convergence theorems for generalized hybrid-type sequences and some nonlinear mappings
Sachiko Atsushiba
RIMS共同研究 「関数空間の深化とその周辺」, 2018.11.27.   27 Nov 2018   RIMS共同研究
Convergence theorems for normally generalized hybrid sequences and hybrid-type mappings [Invited]
Atsushiba Sachiko
The 6th Asian Conference on Nonlinear Analysis and Optimization (Nao-Asia2018)   7 Nov 2018   
Attractive point, fixed point and convergence theorems for generalized hybrid-type mappings
Sachiko Atsushiba
日本数学会2018年度秋季総合分科会 実函数論分科会   26 Sep 2018   日本数学会
Attractive point and convergence theorems for hybrid-type sequences
Sachiko Atsushiba
RIMS共同研究 「非線形解析学と凸解析学の研究」(Nonlinear analysis and con-vex analysis),   27 Aug 2018   RIMS共同研究
Weak convergence theorems for nonlinear hybrid mappings in Banach spaces [Invited]
Sachiko Atsushiba
The 10th Asian Conference on Fixed Point Theory and Optimization (ACFPTO18),   17 Jul 2018   
Weak and strong convergence theorems for a sequence of nonlinear operators
Sachiko Atsushiba
日本数学会2018年度年会  実函数論分科会,   2018   日本数学会
Attractive point theorems and convergence theorems for nonlinear mappings in Hilbert spaces,
Sachiko Atsushiba
12th International Conference on Fixed Point Theory and Its Applications..   25 Jul 2017   
Attractive point theorems and convergence theorems for nonlinear mappings, [Invited]
Sachiko Atsushiba
The 10th Anniversary Conference on Nonlinear Analysis and Convex Analysis   5 Jul 2017   
Attractive points, acute point and weak convergence theorems for nonlinear mappings, [Invited]
Sachiko Atsushiba
The 5th Asian Conference on Nonlinear Analysis and Optimization (Nao-Asia2016)   2 Aug 2016   
Attrative points, acute point and fixed point properties for nonlinear mappings,
Sachiko Atsushiba
The 9th Asian Conference on Fixed Point Theory and Optimization 2016 (acfpto2016),   20 May 2016   
Attractive points and fixed point properties for nonlinear mappings,
Sachiko Atsushiba
The Fifth International Symposium on Banach and Function Spaces 2015   2 Sep 2015   
Weak and Strong Convergence Theorems for Some Classes of Nonlinear Mappings, [Invited]
Sachiko Atsushiba
The Ninth International Conference on Nonlinear Analysis and Convex Analysis (NACA2015),   24 Jan 2015   
Strong Convergence Theorems for Nonlinear Mappings by Halpern's Type Iterations in Banach Spaces
Sachiko Atsushiba
The ICM2014 Satellite Conference, The Fourth Asian Conference on Nonlinear Analysis and Optimization   6 Aug 2014   
Strong Convergence Theorems by Halpern's type iterations for nonlinear mappings
Sachiko Atsushiba
The International Conference on Nonlinear Analysis and Optimization (ICNAO2013)   20 Dec 2013